This is not an unusual phenomenon. I grew up in the Czech Republic in the Krkonoše near town Jičín, and ball lightning was very common here. Different sizes. Largest I saw had a diameter of about 1.5 m (but was more yellow color). They most often appear before a storm and can pass through a keyhole and then enlarge again.
It's still me, following my heart 🙂❤️ and something else 👉 https://anonup.com/thread/13230439 💥
In response NEO ONE to his Publication
I think it's kind of like static electricity